The post on solvents was beat to death...so I was a little afraid I wouldn't get any response if I ask my question on bore scopes at the end of that thread. Which one of the cheap bore scopes to purchase? I didn't realize you can now get something cheap that will work I saw that Huffd63 commented that he liked his Teslong bore scope. Looked Teslong up on Amazon and saw a couple of options that were said to be the old and new model 1) Older model with 36 inch rod for around $45 2) New model with 26 inch rod for around $80 Is there a better option? Thoughts and opinions from those who have them....whether you use them to inspect after cleaning or not Thanks. And I hope this hasnt been beat to death in the last few months.
The post on primer pocket diameter reminded me of a Master's Thesis research from 2015 on flash hole diameter and flash hole location by a student at the University of Missouri at Rolla. The school goes by something related to mining engineering now. Anyway the school is one the the best engineering schools in the U.S. You can find the Mater Thesis by searching for its title. "The effect of physical flash hole deviation on factory grade rifle ammunition" The research looked at 1) flash hole size and 2) the location of the flash hole from center to toward the outside and not centered. (and if the non-centered hole shjould be up,down or to the side). The research looked at the effects of 1 and 2 on velocity, pressure and precision in both at .223 and .308 rifle. The flash hole size was interesting. He looked at 2mm, 2,2mm, 2.4mm. 2.8mm , 3mm and 3.2mm or something like that. The 2mm is a standard flash hole. The results in nutshell are that velocity was minimally effected. Pressure increased up to 4% and PRECISION INCREASED by up to 20% when using the 3mm flash hole compared to the standard 2mm flash hole. That is huge. The part about the Alpha 6BR brass using the standard flash hole over the smaller flash hole due to more consistent would seem to be proven by this research. Take a minute to look up the research. A lot of data, but I believe page 115 is the conclusion, can look at the actual data in the 130 pages that follow!
Well it looks like the Devil went down to Georgia yesterday. Johnny couldn't hold his ground. Hope everyone has a good supply of brass/primers/powder/bullets. Not a good time to be thinking about a 6.5 grendal build. This serious shortage may be for a couple of years.
Hopefully there will be a few moderate democrates or Independents who support the 2nd amendment. If not, we may be in trouble.
I an developing a load for a Savage Predator 110. I started the process a couple of years ago before I had to take a break to take care of my mother, so I started over when I got to start shooting and reloading again. I got some neat data from a ladder test and am looking for advice on the next steps. The gun has a 24 in heavy fluted factory barrel that now has around 90 rounds down it. I am using Hornady 140gr match hpbt, H4350,and CCi Br4 primers in small primer pocket Starline Brass deburred and uniformed primer pockets. The bullet is seated .025 off the lands.
I did a ladder test based on my beginning work on the load from before. I had 3 cartridges of each load and increased .3 grs between loads. I list the powder charge, average velocity, standard deviation and group size for each load. the groups were shot with the magnetospeed on the barrel on a windy day at 100 yrds. My old pull to the right demon was at the range!
40 gr 2623 S.D. 8.1 adjusted scope poi during this group 40.3 gr 2632 S.D. 10.0 .74 inch 40.6 gr 2653 S.D. 13.0 .76 inch 40.9 gr 2671 S.D. 8.6 .94 inch 41.2 gr 2703 S.D. 2.4 .93 inch 2 overlapping with the 3rd pulled to the right. 41.5 gr. 2710 S.D. 3.4 .80 inch 2 almost touching and 3rd pulled right 41.7 gr 2735 S.D. 5.5 .44 inch
Prior 3 loads at 41.7 had caused a slightly sticky bolt and a faint ejector mark on 1 of the 3. The 3 today did not cause a sticky bolt and did not show any ejector marks. primers were somewhat flat but rounded at the edge with no real crater. I would still prefer to be less than 41.7 gr.
The powder charge 41.2 to 41.5 looks like the area to investigate. How would you guys proceed? Load more rounds in this zone and measure speed?? shoot groups without the magneto on a more calm day?
On the recent topic about nodes I had commented about an article I had seen on the 6.5 guys page a few years ago. The article talked about the velocity of the bullet leaving the barrell was the reason for the node and barrell harmonics,.not the powder that produced that velocity. I had tried to find the article, but the 6.5 guys home page.seems to be gone. I kept looking and found some info on the article. If you will Google "10 shot ladder test sniper hide august 2017" you can see that info. The research was by Scott Saterlee, who also was using and promoting the 10 shot ladder test. Just thought it was interesting and that some of you might want to look it up. I believe Scott is very knowledgeable. Anyway, neat topic.
My reloading bench is in the basement. I also clean my guns in this area. I mostly use Butches, and really don't like breathing the fumes from any cleaning or reloading solutions. It would be easy to install a stove vent over one end of the bench. Any problems or.concerns with using a stove vent for fumes that may or may not be combustible? Anyone used a stove vent? Other options to vent?
Looking to add an additional single stage press. I am thinking something more "free floating" to help with alignment. Thoughts on the advantages of this in general, and recommendations on what to buy would be greatly appreciated.
Newbie to the form and newbie to the 6.5. Bought a Savage 10/110 predator in 6.5 with adjustable acu-stock. Decided on Starline srp brass. Prepped the brass: deburred flash holes, uniformed the primer pockets, Full length sized, ran a little short so did not trim then cleaned. Loaded 20 rds of 140 gr Hornady BTHP over 40 gr H4350 with Br4 primers at sammi coal to break in the barrel. After break in loaded 2 each of loads for a ladder test (.025 off the lands) with the following results from a magnetospeed. About 55 degrees outside today. Shot the 2 at a powder level then let the barrel cool before firing another set. 40 gr velocity 2597 and 2593 40.3 gr velocity 2640 and 2607 40.6 gr velocity 2636 and 2651 40.9 gr velocity 2677 and 2675 41.2 gr velocity 2688 and 2683 Stopped at 41.2 with my initial loading because I didn't know how the pressure would be with the lower case capacity Starline. No pressure signs at all on any of the cases. I don't understand the big variations in velocity at 40.6 and 40.9. Surprised with how close the other charge were on the 2 velocities.
I would assume that I need to load some more rounds moving up in charge as It seems that many find a sweet spot around 2725? My understanding is that a node is where the charge is increased but the velocity does not increase accordingly?? Does this data show any thing for these powder ranges? How much does the barrel being new affect the velocities and the test? How will I know where a velocity node is when I run the test on out? The 40.9 gr looks exceptional at just 2 fps difference. About how far out on powder charge should I reload for the test? Range just a 1/4 mile down the road, so no real need to over load for a trip to a range.